Apple released OS X El Capitan 10.11.4 on Monday to go along with its iOS 9.3, and tvOS 2.2 updates. The El Capitan update added support for Live Photos, secure Notes, and more.
OS X El Capitan 10.11.4 adds Notes passwords, more
The 10.11.4 update adds support for passcode protected Notes, the ability to import Evernote content into Notes, and improved Notes sorting. Live Photos can now be shared between iOS and OS X via Messages and AirDrop, improved Raw image opening in Photos, fixed the annoying t.co link issue in Safari, fixed an issue that caused USB audio devices to disconnect, and more.
The OS X El Capitan 10.11.4 update is free and available for download through the Mac App Store's Updates tab. If you aren't seeing the update, just search for OS X El Capitan and click the Download button on the app description page.